JPH0337461Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field of the Invention> This invention relates to a seat reclining device for an automobile seat.

<Prior art and its problems> As shown in FIG. 5, for example, a conventional seat reclining device is provided within a reclining cover 3 at a hinge portion between a seat cushion 1 and a seat recliner 2, and a By lifting upward the knob 5 at the tip of the reclining lever 4 that protrudes forward,
The seat bag 2 is designed to be tiltable relative to the seat cushion 1. In normal conditions, the lever 4 is rotated downwardly by a return spring within the cover 3 to maintain its locked state.

However, in such a conventional seat reclining device, since the lever 4 for tilting operation protrudes from the cover 3, the lever 4
There was a risk that the lever 4 would move if the safety belt got caught on it or if it hit something else, releasing the lock and causing the seat back 2 to tilt during driving.

<Purpose of the invention> Therefore, the purpose of the invention is to provide an improved seat reclining device that prevents the seat reclining lever from moving except when operated by a passenger.

<Structure of the invention> The seat reclining device according to this invention is
The seat reclining lever is divided into two in the longitudinal direction to form a first lever on the operation knob side and a second lever on the base end side, and the first lever side of the second lever is formed to have a U-shaped or cylindrical cross section, The second
A longitudinally elongated hole is provided on the first lever side of the lever, a pin that engages with the elongated hole on the second lever side is provided on the second lever side of the first lever, and a pin that engages with the elongated hole on the second lever side is provided. The second lever side is housed in a portion of the second lever that is formed to have a U-shaped cross section or a cylindrical shape so as to be slidable in the longitudinal direction.

<Description of Embodiment> In one embodiment of this invention shown in Fig. 1,
The seat reclining lever 4 is divided into two parts: a first lever 41 on the operating knob 5 side and a second lever 42 on the base end side. The knob 5 is normally visible through the hole 31 of the cover 3 to the extent that it can be grasped.
The second lever 42 has a U-shaped cross section on the first lever 41 side, and the first lever 41 is held there so that it can slide. An elongated hole 43 is provided in the U-shaped cross section of the second lever 42 in the longitudinal direction, and a pin 44 provided on the first lever 41 is engaged with this elongated hole 43 . To prevent the pin 44 from coming off the long hole 43, insert the long hole 43 into the stopper 46 from both sides.
The return spring 45
It is pulled proximally by the

In the normal state, that is, when not operated, the first lever 41 is pulled by a return spring 45 and stored in the second lever 42 so that the knob 5 does not catch a safety belt or a hem of clothing. Moreover, most of the knobs 5 are housed within the cover 3. During the reclining operation, the knob 5 slightly protruding from the cover 3 is pulled out against the spring 45 and rotated upward to release the lock and perform the reclining operation. As shown in FIGS. 2 and 3, the relationship between the lever 4 and the hole 31 in the cover 3 is such that the hole 31 in the cover 3 is large enough to accommodate the knob 5 in the locked position, and in the upper tilted position. Now, by making the knob 5 smaller than this and large enough to allow the first lever 41 to pass through, it is possible to prevent the knob 5 from moving upward in the lock position, and the knob 5 can be inserted into the hole 31.
It is safer because the knob 5 can only be moved upward after being pulled out.

In another embodiment of the invention shown in FIG.
It is slidably held in the cylindrical part of. A long hole 403 is provided in the cylindrical portion of the second lever 402 in the longitudinal direction, and a pin 404 provided on the first lever 401 is engaged with this.
4 is engaged with a long hole 406 provided in a long piece of the bell crank 405. bell crank 40
5 is pivotally connected at its intermediate portion and is swingable, and its short piece is pivotally connected to one end of a link 407 and is pulled toward the proximal end by a return spring 408. The other end of the link 407 protrudes from the hole 32 of the cover 3, and an operation button 409 is fixed thereto.

When the bell crank 405 is not operated, the pivot point P between the short piece of the bell crank 405 and the link 407 is
Since the bell crank 405 is located above the pivot point Q of the pin 40, the bell crank 405 is urged to rotate clockwise in the figure by the tensile force of the return spring 408.
The first lever 401 engaged through the lever 4 is pulled rightward and stored within the cylindrical portion of the second lever 402. During operation, by pressing the button 409 at the tip of the link 407, the pivot point P between the link 407 and the bell crank 405 will be below the swinging fulcrum Q of the bell crank 405, so the bell crank 405 will now move to the return spring. 408, the first lever 401, which engages the bell crank 405 via the pin 404, is moved to the left and the second lever 401 is rotated counterclockwise.
The lever 402 is pulled out, the knob 5 comes out of the hole 31, and a tilting operation is performed by moving the knob 5 upward. After the tilting operation is completed, by moving the knob 5 downward and pushing it rearward at the locked position, the first lever 401 is housed in the second lever 402 and becomes the state shown in the figure. In this embodiment, since the knob 5 is pulled out by operating the button 409, the knob 5 can be completely buried in the hole 31.

<Effects of the invention> As described above, in the seat reclining device according to this invention, the seat reclining lever is divided into two in the longitudinal direction to form the first lever and the second lever, and the first lever on the operation knob side is used as the second lever. When operating, the first lever is slidably held against the second lever.
Since the first lever can be pulled out from the lever and retracted into the second lever when not in operation, most of the reclining lever is hidden within the cover and is unlocked when a safety belt or other object hits the reclining lever. Fear disappears.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of essential parts showing one embodiment of this invention, Figs. 2 and 3 are external perspective views of another embodiment of this invention, and Fig. 4 shows yet another embodiment of this invention. FIG. 5 is a perspective view of the main parts and a schematic diagram of a conventional device. 1... Seat cushion, 2... Seat back, 3... Reclining cover, 4... Reclining lever, 5... Knob, 41... First lever, 42... Second lever.

Claims (1)

[Claims for Utility Model Registration] A seat reclining device in which a seat back can be tilted relative to a seat cushion by operating a seat reclining lever provided protruding from a hinge portion between a seat cushion and a seat back, the seat reclining device comprising: The reclining lever is divided into two parts in the longitudinal direction to form a first lever on the operation knob side and a second lever on the proximal end side, and the first lever side of the second lever is formed into a U-shaped or cylindrical cross section. A long elongated hole is provided in the longitudinal direction on the first lever side of the second lever, and the second lever is provided on the second lever side of the first lever.
In addition to providing a pin that engages with the long hole on the lever side,
A seat reclining device in which a second lever side of a first lever is housed in a portion of the second lever having a U-shaped or cylindrical cross section so as to be slidable in the longitudinal direction.